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Finding the Fourth Proportional to 123,920.20, 185,675.10 and 71,237.80

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Solution

The fourth proportional to 123,920.20, 185,675.10 and 71,237.80 is: 106,738.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,920.20 : 185,675.10 = 71,237.80 : x
  2. Step 2: Convert to fraction form
    123,920.20/185,675.10 = 71,237.80/x
  3. Step 3: Cross multiply
    123,920.20x = 185,675.10 × 71,237.80
  4. Step 4: Simplify right side
    123,920.20x = 13,227,085,638.78
  5. Step 5: Solve for x
    x = 13,227,085,638.78/123,920.20
  6. Step 6: Final answer
    x = 106,738.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.